Cov cawv twg evaporates sai dua?
Cov cawv twg evaporates sai dua?

Video: Cov cawv twg evaporates sai dua?

Video: Cov cawv twg evaporates sai dua?
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Rubbing cawv muaj feem ntau ntawm ethanol los yog isopropanol.

Ethanol thiab isopropanol boil ntawm qhov kub qis dua dej, uas feem ntau txhais tau tias lawv yuav evaporate sai dua dua dej. Qhov kub kub yog qhov loj heev txiav txim siab los ntawm kev sib cuam tshuam zoo nkauj ntawm cov kua dej

Xav txog qhov no, qhov twg evaporates sai dua dej lossis cawv?

Raws li cawv evaporates ntawm ntau sai dua tus nqi piv nrog dej vim nws qhov kub qis dua (82 piv rau 100 ° C), nws muaj peev xwm nqa tau cua sov los ntawm daim tawv nqaij. Qhov no txhais tau tias rau lub sijhawm muab sijhawm ntau dua cawv evaporates tshaj dej.

Qhov thib ob, puas isopropyl cawv evaporate sai? Ua kua xws li isopropyl cawv yuav muaj acertain khoom hu ua vapor pressure. Txij li thaum cov molecules feem ntau dawb txav mus los, qee qhov txav mus sai dua tshaj lwm tus thiab muaj peev xwm khiav tawm ntawm cov kua dej. Ntshiab isopropylalcohol yuav ib txwm evaporate tag nrho ntawm roomtemperature nyob rau hauv peb tus qauv huab cua.

Tsis tas li ntawd, qhov twg cov kuab tshuaj evaporates sai tshaj plaws?

TXOJ CAI. Los ntawm kev tshuaj xyuas cov ntaub ntawv no, kuv pom tias NPR (acetone) yuav evaporate ceev tshaj plaws , tom qab byalcohol ces dej; mis nyuj, dej qab zib thiab syrup evaporated kawg, nyob ntawm nws txoj cai lij choj.

Qhov twg evaporates sai dua ethanol lossis acetone?

Acetone evaporates ntau sai dua dua li dej, txawm hais tias nws cov molecular mass yog ntau tshaj peb zaug. Ethanol nthuav tawm hydrogen bonding ntawm ethanol molecules tab sis tsis evaporate sai li dej.

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